Nagios View Discrepancies

[Greg Vickers]

Hi Michael

 From your email you are showing two different things: HOST detail and 
SERVICE detail.

Your HOSTs are being checked with a ping when one of their services goes 
into a non-OK state. (I'm assuming that's how you've got Nagios 
configured) So when you look at your HOST status you see the result of 
the HOST check, i.e. a ping result.

In your SERVICE detail, you have a ping SERVICE defined. (Service name 
"PING") which (unlike a host check) is regularly scheduled. (Host checks 
are only performed when a service enters a non-OK state.)

So. The PING SERVICE on metro-c6506-1 returns a non-OK (i.e. stops 
responding to pings) THEN the host check is placed into the check queue 
and is executed later (to confirm host reachability.) Hence you will see 
two different results from your HOST check (a ping) and your SERVICE 
check (also a ping) because they get executed at different times.

HTH,
Greg

Michael S. Klapheke wrote:
> Nathan,
> 
> Thanks for the reply.  This has been going on for a little while 
> longer.  Hopefully the image below will come through:
> 
> HOST DETAIL:
> 
>  
> 
> *Host Sort by host name (ascending) 
> <http://198.36.18.243/nagios/cgi-bin/status.cgi?hostgroup=all&style=hostdetail&sorttype=1&sortoption=1>Sort 
> by host name (descending)*
> 
> 	
> 
> *Status Sort by host status (ascending)Sort by host status (descending)*
> 
> 	
> 
> *Last Check Sort by last check time (ascending)Sort by last check time 
> (descending)*
> 
> 	
> 
> *Duration Sort by state duration (ascending)Sort by state duration time 
> (descending)*
> 
> 	
> 
> *Status Information*
> 
> metro-c6506-1 
> 
> 	
> 
> View Service Details For This Host
> 
> 	
> 
> UP
> 
> 	
> 
> 01-11-2005 15:03:45
> 
> 	
> 
> 1d 21h 41m 50s
> 
> 	
> 
> PING OK - Packet loss = 0%, RTA = 0.71 ms 
> 
> scsd-metro-pix-1 
> 
> 	
> 
> View Service Details For This Host
> 
> 	
> 
> UP
> 
> 	
> 
> N/A
> 
> 	
> 
> 1d 20h 0m 50s
> 
> 	
> 
> (null) 
> 
>  
> 
> Service DETAIL:
> 
> *Host Sort by host name (ascending)Sort by host name (descending)*
> 
> 	
> 
> *Service Sort by service name (ascending)Sort by service name (descending)*
> 
> 	
> 
> *Status Sort by service status (ascending)Sort by service status 
> (descending)*
> 
> 	
> 
> *Last Check Sort by last check time (ascending)Sort by last check time 
> (descending)*
> 
> 	
> 
> *Duration Sort by state duration (ascending)Sort by state duration time 
> (descending)*
> 
> 	
> 
> *Attempt Sort by current attempt (ascending)Sort by current attempt 
> (descending)*
> 
> 	
> 
> *Status Information*
> 
> metro-c6506-1
> 
> 	
> 
>  
> 
> 	
> 
> PING
> 
> 	
> 
>  
> 
> 	
> 
> OK
> 
> 	
> 
> 01-13-2005 12:43:44
> 
> 	
> 
> 1d 21h 45m 11s
> 
> 	
> 
> 1/3
> 
> 	
> 
> PING OK - Packet loss = 0%, RTA = 0.75 ms 
> 
>  
> 
> 	
> 
>  
> 
>  
> 
> 	
> 
>  
> 
> scsd-metro-pix-1
> 
> 	
> 
>  
> 
> 	
> 
> PING
> 
> 	
> 
>  
> 
> 	
> 
> OK
> 
> 	
> 
> 01-13-2005 12:44:59
> 
> 	
> 
> 1d 20h 4m 11s
> 
> 	
> 
> 1/3
> 
> 	
> 
> PING OK - Packet loss = 0%, RTA = 20.41 ms 
> 
>  
> 
>  
> 
> I just don’t understand why they’re different….any ideas?  I tried 
> restarting Nagios and rebooting the Linux machine, but neither one heped.
> 
>  
> 
> Thanks again.
> 
>  
> 
> Mike
> 
> -----Original Message-----
> *From:* Nathan Oyler [mailto:noyler at khimetrics.com]
> *Sent:* Thursday, January 13, 2005 9:31 AM
> *To:* Michael S. Klapheke
> *Subject:* RE: [Nagios-users] Nagios View Discrepancies
> 
>  
> 
> I’ve seen that once when I restarted a nagios, when a system was down, 
> but when up during the nagios restart.
> 
>  
> 
> It corrected itself in about a day.
> 
>  
> 
> ------------------------------------------------------------------------
> 
> *From:* nagios-users-admin at lists.sourceforge.net 
> [mailto:nagios-users-admin at lists.sourceforge.net] *On Behalf Of *Michael 
> S. Klapheke
> *Sent:* Thursday, January 13, 2005 7:00 AM
> *To:* nagios-users at lists.sourceforge.net
> *Subject:* [Nagios-users] Nagios View Discrepancies
> 
>  
> 
> Hi  I’m getting differences between the output from the Service Detail 
> Screen and the Host Detail screen for the same host during a ping 
> check.  Has anyone else seen this?  I’m new to Nagios, and I was 
> wondering if the database may have gotten corrupt?  I don’t know how to 
> fix this, so any help is appreciated.
> 
>  
> 
> Also, are there any special requirements for removing a host (other than 
> removing it from the hosts.cfg, services.cfg, etc.)
> 
>  
> 
> Thanks!
> 
> Mike
> 
>  
> 

-- 
Greg Vickers
Security Engineer
Network Services
Information Technology Services
Queensland University of Technology

email: g.vickers at qut.edu.au
phone: (07) 3864 9536

CIROS code: 00213J


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